Reshiram, The Vast White Pokémon. This Pokémon appears in legends. It sends flames into the air from its tail, burning up everything around it. When Reshiram's tail flares, the heat energy moves the atmosphere and changes the world's weather.

Overview

Reshiram is the cover star of Pokémon Black and the only Dragon/Fire Pokémon in existence. Like most legendaries of recent generations, it is fairly slow with base 90 Speed, but it makes up for that in pure power. Dragon/Fire is nearly unresisted, and Reshiram gets crazy good moves and STAB on both types. Actually, now I think about it, because of its ability Turboblaze (a glorified Mold Breaker), Dragon/Fire is completely unresisted, as the only Pokémon that would resist it would be Heatran with Flash Fire. It can also abuse Groudon's Drought ability really well and more or less makes you a stupidly strong powerhouse. Reshiram's design is pretty nice. It looks nice and elegant. Its other stats are good too. It has a good Attack stat, although you'd only use that for a mix or surprise set... it is generally bulky too; 100/100/120 are pretty good stats for a primarily offensive Pokémon!

Abilities

Turboblaze: As I've said, it is a glorified Mold Breaker. Not that it is bad, but it basically is Mold Breaker. It ignores abilities that would hinder or stop your attacks from working, which is mostly useful for Flash Fire Heatran.

POWER! Blue Flare is a Reshiram exclusive move. It has 130 power, 85 accuracy and a 20% chance to burn. It's amazing. Draco Meteor is also beast. 140 base power, 90 accuracy, but lowers Special Attack by 2 stages after each use... so switch out after you use it. Fusion Flare is your reliable attack as it has good power and 100 accuracy. However, if you'd rather have more than 5 (or 8) PP and a chance to burn, run Flamethrower. It is only a little weaker. Dragon Pulse is your reliable Dragon attack. Focus Blast helps deal good damage to Blissey and Chansey, but especially to Tyranitar.

Raise that subpar Speed with Flame Charge. Nitro Charge was a much cooler name, but whatever. Although weak, Flame Charge boosts your Speed by 1 stage, which is very important considering this set is supposed to sweep. Blue Flare is amazing, better than Fire Blast, best Fire attack in the game, etc. Dragon Pulse is your Dragon attack if you are running a purely special set. Draco Meteor is better on the mixed set as you can still sweep with Outrage. Focus Blast provides coverage against Normals and Tyranitar. Outrage allows you to massacre standard special walls.

Not too effective as it has a fairly low Speed, but its power means a lot of Pokémon will be retreating, giving it time to set up its screens. Reflect doubles Defence, Light Screen doubles Special Defence. Blue Flare is your best move. Draco Meteor hits hard but means you have to switch, but you'll be switching around anyway. Dragon Pulse is reliable and fairly strong. Outrage is to mix it up and hit Blissey, Chansey, Kyogre and Tyranitar hard.

EVs & Natures

Reshiram
252 Special Attack and 252 Speed. 4 in Attack if you are using an Attack, 4 in HP or Special Defence if you aren't. If you are running a pure Attack set, run 252 Attack, 252 Speed.

Other Options

Physical, AncientPower, Dragon Tail, Imprison, Overheat, Psychic, Shadow Ball, Substitute, Will-O-WispPhysical attacks are usable, but Reshiram does better with special. Choice Band, physical Flame Charge, those are two paths you can take to get to physical city.AncientPower can really hurt Ho-Oh, but that's about it. If you get the boost, go nuts. You probably won't though.Dragon Tail forces a switch and deals damage, but is hardly worth using on Reshiram. Support isn't its strong point.Imprison can be cool in doubles... I guess. Not too useful in singles.Overheat is a Fire Draco Meteor. Useless next to Blue Flare.Psychic is another special attack. Not too good.Shadow Ball is another special attack. Not too good.Substitute is pretty effective on Reshiram. Reshiram is scary and forces a lot of switches, so running 3 attacks+sub is a good tactic.Will-O-Wisp is semi usable, but you should focus on being offensive.

Double & Triple Battle Options

The most obvious option is Fusion Bolt. If either move is used after the other, they double in power. Yeah, the second move gets 300 base power counting STAB. That is ridiculous. However, only Zekrom and Victini (and Smeargle I guess) get Fusion Bolt. Running Reshiram alongside Groudon is sort of awesome due to infinite sun. Sadly, Reshiram doesn't get many multi targeting moves, and is weak to Earthquake and Rock Slide. It can be effective, but it isn't the best Pokémon to be running in doubles/triples.

Partners

GROUDON. Or Ninetales... I guess. But DROUGHT. Drought basically makes Reshiram unstoppable. Nothing can take a Blue Flare once sun is out. Having a reliable way of removing Kyogre is pretty vital, as otherwise you lose out on sun. Rayquaza is in a similar boat. Same as Tyranitar. Not that they can switch into anything but Fire attacks safely, but still. Take out Stealth Rock and Spikes as soon as they are set up, as Reshiram takes 25% from Stealth Rock. Make sure to run a Steel so you can resist Dragon attacks from Scarf Dragons. Also, Wobbuffet works really well as it can trap Scarf Palkia and Scarf Garchomp and kill them with CounterCoat.

Countering Reshiram

Countering something that has no counters... hm. Well, looks like I'm done here!

Okay, so you have a few Pokémon that can switch into Dragon moves and Fire moves, but not both. In sun, the entire game is 2HKOed, even Chansey and Blissey. Kyogre is a great switch in to Fire moves, as is Tyranitar. Dragon moves are much more simple; Wobbuffet and Steelix. If you mispredict, you will have a fainted Pokémon. Chansey and Blissey can take Dragon attacks well enough. Revenge killing Reshiram is the safer option. Rayquaza, Garchomp, Palkia, Latios and Latias, just make sure not to switch into any actual attacks. Removing sun is vital in taking Reshiram out. It gives it so much power it is scary. Prankster Thunder Wave cripples Reshiram no matter how fast it is, which can be vital in removing it. Honestly, Reshiram is one of the scariest Pokémon in the game. Be very, very careful if you ever face one. There is so few ways to deal with it, and whenever it is on the field, you are at risk of losing a Pokémon. Especially if sun is up. God help you if sun is out and it has Flame Charge boosts.